Concrete-form clamp



oct. 23, 192s. 1,689,151

R. G. MERCER ET AL CONCRETE FORM CLAMP File Sept. l0, 1927 Y INVENTok.

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RUSSELL MERCER AND GEORGE W. MERCER, OF- SAN FRANCISCO, CALIFORNIA.

CONCRETE-FORM CLAMP.

Application filed September 10, 1927. Serial No. 218,702.

This invention relates to improvements in concrete torni clamps. Y l

'l` he principal object or this invention is to provide a form clampwhich may be used 5 with the ordinary concrete terms tor the purpose ofholding the column form boards to the wall vtoi-1n boards.

Another object is to produce a clamp which may be employed inconjunction with ordinary form boards without altering their customaryarrangement.

A 'further object is to produce a device which is economical tomanufacture. i

A still further object is to produce a clamp which is capable of variousadjustments so as to accommodate columns ot various sizes.

Other objects and advantages will be apparent during the course ot thefollowing descript-ion.

ln the accompanyingdrawings torn'iing a part of this specification andin which like numerals are employed to designate like parts throughoutthe same, C

Figure 1 is a fragmentary top plan view ot a concrete form showing acolumn Jform with our clamps applied thereto,

Figure 2 is a side elevation on an enlarged scale on one of the clampmembers, and

Figure 3 is an enlarged perspective detail view showing the position thesecuring element will assume in relation to the form boards.

At the present time in constructing concrete. structures where it isrequired to place a column in conjunction with the concrete wall, it isnecessary to build out 'from the wall or form boards 'for the wall, aprojecting form into which the concrete will be placed for casting thecolumn. rlhese projecting forms have been heavily constructed and nailedtight and otherwise secured to the torni boards ot' the wall, whichsecuring operation was a tedious one and also an expensive one.

Applicants have therefore produced a clamp which may be employed inconjunction with the wall boards in such a manner that the form boardsfor the columns may be quickly and securely fastened and held inl placeboth before and after the forms have been filled.

Referring to the drawings particularly to Figure 1', it will be notedthat the numerals 5 and 6 refer to parallel form boards between whichconcrete may be poured. These form boards are common in concreteconstruct-ion. The numerals 7 and 8 refer to form boards which willhereafter be termed the column form boards and talen with the board 9,l'orm an oiset in the mold which otfeet will cast a lprojection upon the.wall 6 in the torni of a plate 11 is provided with a web 18 which isrecessed at 14k and has parallel anchor bars 1G extending therefrom.

It will be noted that these anchor bars are secured to the forward edgeof the web 13 and have their rear ends in the same plane as the recessportion 141-. This permits the form boards 6 shown in, dotted lines inthis ligure to abut the web 13 and to iiev behind the end of the anchorbars, while the recess 14 permits the column board 8 to abut the formboards 6 and to lie between the` plate 12 and the anchor bars 16. As thesecuring ele-y ments and associated parts are identical on bot-h sidesot' the column, but one set will be described.

Pivotally secured between the anchor plates 16 is a pivoted draw bar 17.rlfhis bar is adapted to pass through a casting 18 and has recesses 19formed therein, which recesses cooperate with a wedge 1 in such a.manner that when the wedge is moved in one direction it will exertpressure between the draw bar 17 and the casting 18 in such a manner asto move the casting toward the securing element. ln doing this one edgeQ2 ot the casting will contact the column board 9 therer by securelyclamping the same. As the ar rangement or' the opposite side of thedevice is identical, the same action will take place.

In order to draw the castings 18 toward each other a cross bar 9.3 isprovided, which cross bar has notches 24 formed therein, the notches atthe opposite ends being opposed to each other, therefore by theemployment ot a wedge 26 upon each side of the device as illustrated inFigure 1, pressure may be brought against both of the cast-ings in sucha mann er as to move them toward each other thereby further clamping theform board 9.

It is understood that the clamping menibers 18 have slidewaystherethrough 'through which the draw .bars and cross rod have a slidingengagement.

It Will thus be seen that We have produced a device which willaccomplish all of the objects above set forth.

It is to be understood that the. form or' our invent-ion herewith shownand described is to be taken as a preferred example of the same and thatvarious changes relative to t-he material, size, shape and arrangementof parts may be resorted to Without departing from the spirit of theinvention or the scope of the subjoined claims.

' Having thus described our invention, We claim 1.7In a device of thecharacter described, a securing element adapted to be retained incontact With the form boards of a concrete form, anchor bars formedintegral with said securing element, a draw bar pivoted to said anchorbars and a clamping element carried by said draw bar Jfor the purposespecified.

2. In a device of the character described, a securing ele-mentcomprising a` plate having angularly disposed sides, a Web carried byone of said sides, anchoring` means carried by said Web, a draw barsecured to said anchoring means and a. slidable member movble on saiddraw bar for the purpose speci- In a device of the character described,a

*securing element comprising a` plate having tures.

RUSSELL G. MERCER. GEORGE W. MERCER.

